package com.xj.reggie.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.xj.reggie.common.CustomException;
import com.xj.reggie.dto.DishDto;
import com.xj.reggie.entity.Dish;
import com.xj.reggie.entity.DishFlavor;
import com.xj.reggie.mapper.DishMapper;
import com.xj.reggie.service.DishFlavorService;
import com.xj.reggie.service.DishService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.List;
import java.util.stream.Collectors;

/**
 * @Author XJ
 * @Date 2022/10/18 19:37
 * @PackageName:com.xj.reggie.service.impl
 * @ClassName: DishServiceImpl
 * @Description: TODO
 * @Version 1.0
 */
@Service
@Slf4j
public class DishServiceImpl extends ServiceImpl<DishMapper, Dish> implements DishService {

	@Autowired
	private DishFlavorService dishFlavorService;

	/**
	 * 新增菜品，同时保存对应的口味数据
	 * @param dishDto
	 */
	@Transactional
	public void saveWithFlavor(DishDto dishDto) {
		//保存菜品的基本信息到菜品表dish
		this.save(dishDto);

		Long dishId = dishDto.getId(); //菜品id

		//菜品口味
		List<DishFlavor> flavors = dishDto.getFlavors();
		flavors = flavors.stream().map((item)->{
			item.setDishId(dishId);
			return item;
		}).collect(Collectors.toList());

		//保存菜品口味数据到菜品口味表dish_flavor
		dishFlavorService.saveBatch(flavors);
	}


	/**
	 * 根据id查询菜品信息和对应口味信息
	 * @param id
	 * @return
	 */
	public DishDto getByIdWithFlavor(Long id) {
		//查询菜品基本信息，从dish表查询
		Dish dish = this.getById(id);

		DishDto dishDto = new DishDto();
		BeanUtils.copyProperties(dish,dishDto);

		//查询当前菜品对应的口味信息，从dish_flavor表查询
		LambdaQueryWrapper<DishFlavor> queryWrapper = new LambdaQueryWrapper<>();
		queryWrapper.eq(DishFlavor::getDishId,dish.getId());
		List<DishFlavor> flavors = dishFlavorService.list(queryWrapper);
		dishDto.setFlavors(flavors);

		return dishDto;
	}

	@Override
	@Transactional
	public void updateWithFlavor(DishDto dishDto) {
		//更新dish表基本信息
		this.updateById(dishDto);

		//先清理当前菜品对应口味数据---dish_flavor表的delete操作
		LambdaQueryWrapper<DishFlavor> queryWrapper = new LambdaQueryWrapper<>();
		queryWrapper.eq(DishFlavor::getDishId,dishDto.getId());

		dishFlavorService.remove(queryWrapper);

		//添加当前提交过来的口味数据---dish_flavor表的insert操作
		List<DishFlavor> flavors = dishDto.getFlavors();

		flavors = flavors.stream().map((item)->{
			item.setDishId(dishDto.getId());
			return item;
		}).collect(Collectors.toList());

		dishFlavorService.saveBatch(flavors);
	}

	/**
	 *套餐批量删除和单个删除
	 * @param ids
	 */
	@Override
	@Transactional
	public void deleteByIds(List<Long> ids) {

		//构造条件查询器
		LambdaQueryWrapper<Dish> queryWrapper = new LambdaQueryWrapper<>();
		//先查询该菜品是否在售卖，如果是则抛出业务异常
		queryWrapper.in(ids!=null,Dish::getId,ids);
		List<Dish> list = this.list(queryWrapper);
		for (Dish dish : list) {
			Integer status = dish.getStatus();
			//如果不是在售卖,则可以删除
			if (status == 0){
				this.removeById(dish.getId());
			}else {
				//此时应该回滚,因为可能前面的删除了，但是后面的是正在售卖
				throw new CustomException("删除菜品中有正在售卖菜品,无法全部删除");
			}
		}

	}
}
